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All-magnetic slabs and Multiferroism in (Bi2-xO2)(MF4) Aurivillius oxyfluorides, (M= Fe, Ni)

hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorMENTRÉ, Olivier
hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorJUÁREZ-ROSETE, Miguel
hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorCOLMONT, Marie
hal.structure.identifierInstitut Laue-Langevin [ILL]
dc.contributor.authorRITTER, Clemens
hal.structure.identifierCELLS ALBA synchroton = ALBA Synchrotron [CELLS ALBA]
dc.contributor.authorFAUTH, François
hal.structure.identifierInstitut de Chimie de la Matière Condensée de Bordeaux [ICMCB]
dc.contributor.authorDUTTINE, Mathieu
hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorHUVÉ, Marielle
hal.structure.identifierPlateforme en Imagerie Cellulaire et Tissulaire [PICT]
dc.contributor.authorTERRYN, Christine
hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorDUFFORT, Victor
hal.structure.identifierUnité de Catalyse et Chimie du Solide - UMR 8181 [UCCS]
dc.contributor.authorARÉVALO-LÓPEZ, Angel
dc.date.issued2022
dc.identifier.issn0897-4756
dc.description.abstractEnThe Aurivillius layered compounds with predominant fraction of paramagnetic transition metals are an emerging playground for discovery of magnetoelectric or multiferroic compounds. This aim was recently achieved by incorporating Fanions in the perovskite layer of the (Bi2O2)(CoF4) compound, only described so-far in a disordered model (unit cell : ap, ap, c). Here we report the investigation on the representative compounds (Bi2O2)(MF4) (M = Fe, Ni) using single crystal, synchrotron, neutron and electron diffraction. These reveal that the crystallographic average cell (2xap, 2xap, c) is orthorhombic, polar and accompanied by versatile (in)commensurate modulations. The supercell model was fully refined for (Bi2-xO2)(FeF4) (q = (0, ½, 0)) in the P2111 polar space group with transverse Fe-displacements relative to q. Bi-deficiency is compensated by a mixed Fe 2.5+ valence, but, the ideal stoichiometry is preserved for (Bi2O2)(NiF4). Both compounds are antiferromagnetic below TN = 89 K (Fe) and 45 K (Ni) with moments lying in the (ac) plane and a weak ferromagnetic component along the b-axis. DFT calculations validate a strongly anisotropic distribution of magnetic exchanges (Jab/Jc > 10). A broad anomaly on the dielectric constant at TN and a polarization loop at room temperature were obtained on (Bi2-xO2)(FeF4) single crystals, revealing multiferroism with magneto electric couplings.
dc.language.isoen
dc.publisherAmerican Chemical Society
dc.title.enAll-magnetic slabs and Multiferroism in (Bi2-xO2)(MF4) Aurivillius oxyfluorides, (M= Fe, Ni)
dc.typeArticle de revue
dc.identifier.doi10.1021/acs.chemmater.2c01213
dc.subject.halChimie/Matériaux
bordeaux.journalChemistry of Materials
bordeaux.page5706–5716
bordeaux.volume34
bordeaux.issue12
bordeaux.peerReviewedoui
hal.identifierhal-03783310
hal.version1
hal.popularnon
hal.audienceInternationale
hal.origin.linkhttps://hal.archives-ouvertes.fr//hal-03783310v1
bordeaux.COinSctx_ver=Z39.88-2004&rft_val_fmt=info:ofi/fmt:kev:mtx:journal&rft.jtitle=Chemistry%20of%20Materials&rft.date=2022&rft.volume=34&rft.issue=12&rft.spage=5706%E2%80%935716&rft.epage=5706%E2%80%935716&rft.eissn=0897-4756&rft.issn=0897-4756&rft.au=MENTR%C3%89,%20Olivier&JU%C3%81REZ-ROSETE,%20Miguel&COLMONT,%20Marie&RITTER,%20Clemens&FAUTH,%20Fran%C3%A7ois&rft.genre=article


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